CN107401614A - Nuclear power safety injection pump mechanical seal end surface - Google Patents
Nuclear power safety injection pump mechanical seal end surface Download PDFInfo
- Publication number
- CN107401614A CN107401614A CN201710628048.0A CN201710628048A CN107401614A CN 107401614 A CN107401614 A CN 107401614A CN 201710628048 A CN201710628048 A CN 201710628048A CN 107401614 A CN107401614 A CN 107401614A
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- CN
- China
- Prior art keywords
- arc
- arc groove
- face
- groove
- mechanical seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
Nuclear power safety injection pump mechanical seal end surface of the present invention, even circumferential, which is spaced apart, on the abrasive end face of dynamic friction ring or static friction ring opens up rectangular channel (1) and arc groove (2) formation dynamic pressure groove；Described arc groove (2) is the circular arc flute profile being made up of arc-shaped edges (A) and straight line (B), the center of circle that the arc-shaped edges (A) of arc groove (2) pass through drag ring to the center line to the center of circle of drag ring, arc groove (2).Arc-shaped edges (A) wall of its arc groove (2) serves stop and guide effect to medium, medium is flowed to abrasive end face cylindrical, reaches reduction leakage.
Description
Technical field
The present invention relates to mechanical seal end surface, particularly nuclear power safety injection pump mechanical seal end surface.
Background technology
Liquid film mechanical sealing, also referred to as contacting mechanical seal, it is stable performance the characteristics of liquid film mechanical sealing, leakage
Measure low.But it is not suitable with this operating mode, mechanical seal end surface meeting for easily vaporization and low boiling point medium, common mechanical seal end surface
There is vaporization, dry grinding, the phenomenon for causing end wear to fail, in order to solve this problem, improve the sealing of mechanical seal end surface
Performance and used life, employs and opens up dynamic pressure groove in mechanical seal end surface, and seal face in the case of rotation draws medium
Enter seal face and produce dynamic pressure effect, mechanical seal end surface is produced good liquid film, thicken liquid film, it is close so as to improve machinery
The service life of envelope.
Although opening up dynamic pressure groove in mechanical seal end surface seal face can be made to produce good liquid film, improve seal face
Service life, but be the leakage rate increase of mechanical seal the problem of bring, it is difficult to which satisfaction has strict demand for leakage rate
Situation.
The planform that prior art opens up dynamic pressure groove on mechanical seal end surface has varied, planform difference,
Applying working condition is different, and caused technique effect is different, the characteristics of respectively having oneself.
Nuclear power safety injection pump is used to convey high-temperature-hot-water, and high-temperature-hot-water is hardly formed liquid film in seal face, causes machinery close
It is short to seal service life.Nuclear power safety injection pump has high requirement to the sealing property of mechanical seal, does not require nothing more than mechanically-sealing apparatus
It is reliable, service life length, can the safe operation under multi-state point, also require that sealing leak amount is small.By largely testing
And field observation, the amount of leakage of traditional dynamic pressure groove sealing structure can not meet nuclear power safety injection pump largely in 50-60ml/h
It is required that seal leakage amount is in 10-15ml/h.
The content of the invention
It is an object of the invention to provide a kind of simple in construction, easy to process, good seal performance, leakage rate is small, service life
It is long, it can fully meet the mechanical seal end surface that nuclear power safety injection pump mechanical seal uses.
Present invention even circumferential on the dynamic friction ring of mechanical seal or the abrasive end face of static friction ring, which is spaced apart, to be opened up
Rectangular channel 1 and arc groove 2, form dynamic pressure groove；
Described arc groove 2 is the circular arc flute profile being made up of arc-shaped edges A and straight line B, and the arc-shaped edges A of arc groove 2 is to friction
The center of circle of ring, the center line of arc groove 2 by or close to drag ring the center of circle.
The left and right end points of arc groove 2 and abrasive end face cylindrical distance L1=1-2mm, most preferably L1=1-1.5mm；
The inner side of arc groove 2 and distance of round L2=5-6mm in abrasive end face；
Spacing L=13-18mm of two arc grooves 2；
By largely testing proof, the quantity of arc groove 2 is relevant with the diameter of drag ring, but between adjacent two arc groove 2
Away from excellent to be important.
Rectangular channel 1 communicates with the cylindrical of drag ring, groove width L3=3-5mm of rectangular channel 1；
The base of rectangular channel 1 and distance of round L4 >=L2 in abrasive end face；
H=5-10 μm of the depth of rectangular channel 1 and arc groove 2.
During present invention work, sealing medium is entered in rectangular channel 1 by abrasive end face is cylindrical, is driven in the rotation of rotating ring
Under, dynamic pressure effect is produced, pushes abrasive end face open, abrasive end face is produced good liquid film；Enter simultaneously in abrasive end face
Medium can enter in arc groove 2 under the drive of rotating ring rotary motion, and the arc-shaped edges A walls of arc groove 2 serve stop to medium
And guide effect, medium is flowed to abrasive end face cylindrical, flow back into outside abrasive end face, reach reduction leakage.
The present invention does not require for the direction of rotation of abrasive end face, avoids because abrasive end face direction of rotation is incorrect
Cause the danger of seal failure.
The present invention proves that it is in the safety injection pump mechanical seal of nuclear power station conveying high-temperature-hot-water by substantial amounts of test data
Use, and under working condition of the mechanically-sealing apparatus without cooling provision, sealing leak amount is 5-10ml/h, fully meets nuclear power
Stand the requirement of safety injection pump mechanical sealing leakage amount.
Brief description of the drawings
Fig. 1 is structural representation of the embodiment of the present invention.
Embodiment
Present invention even circumferential on the dynamic friction ring of mechanical seal or the abrasive end face of static friction ring, which is spaced apart, to be opened up
Rectangular channel 1 and arc groove 2, form dynamic pressure groove；
Described arc groove 2 is the circular arc flute profile being made up of arc-shaped edges A and straight line B, and the arc-shaped edges A of arc groove 2 is to friction
The center of circle of ring, the center of circle that the center line of arc groove 2 passes through drag ring；
The left and right end points of arc groove 2 and the cylindrical distance L1=1-1.5mm of abrasive end face；
The inner side of arc groove 2 and distance of round L2=5-6mm in abrasive end face；
Spacing L=13-18mm of two arc grooves 2；
Rectangular channel 1 communicates with the cylindrical of drag ring；
Groove width L3=3-5mm of rectangular channel 1；
The base of rectangular channel 1 and distance of round L4 >=L2 in abrasive end face；
H=5-10 μm of the depth of rectangular channel 1 and arc groove 2.
Claims (1)
1. nuclear power safety injection pump mechanical seal end surface, it is characterized in that：
Even circumferential, which is spaced apart, on the dynamic friction ring of mechanical seal or the abrasive end face of static friction ring opens up rectangular channel (1) and circle
Arc groove (2), form dynamic pressure groove；
Described arc groove (2) is the circular arc flute profile being made up of arc-shaped edges (A) and straight line (B), the arc-shaped edges of arc groove (2)
(A) to the center of circle of drag ring, the center line of arc groove (2) by or close to drag ring the center of circle；
The left and right end points of arc groove (2) and abrasive end face cylindrical distance L1=1-2mm, most preferably L1=1-1.5mm；
Arc groove (2) inner side and distance of round L2=5-6mm in abrasive end face；
Spacing L=13-18mm of two arc grooves (2)；
Rectangular channel (1) communicates with the cylindrical of drag ring, groove width L3=3-5mm of rectangular channel 1；
Rectangular channel (1) base and distance of round L4 >=L2 in abrasive end face；
H=5-10 μm of the depth of rectangular channel (1) and arc groove (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710628048.0A CN107401614A (en) | 2017-07-28 | 2017-07-28 | Nuclear power safety injection pump mechanical seal end surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710628048.0A CN107401614A (en) | 2017-07-28 | 2017-07-28 | Nuclear power safety injection pump mechanical seal end surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107401614A true CN107401614A (en) | 2017-11-28 |
Family
ID=60401209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710628048.0A Pending CN107401614A (en) | 2017-07-28 | 2017-07-28 | Nuclear power safety injection pump mechanical seal end surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107401614A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109237041A (en) * | 2018-11-12 | 2019-01-18 | 沈阳北碳密封有限公司 | A kind of mechanically-sealing apparatus for high temperature easy vaporized medium |
| CN110159737A (en) * | 2019-06-12 | 2019-08-23 | 大连交通大学 | A kind of novel shaft end sealing device |
| DE112015002652B4 (en) | 2014-06-03 | 2024-06-20 | Thermo King LLC (n.d.Ges.d.Staates Delaware) | MECHANICAL MECHANICAL SEAL |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493146A (en) * | 2009-03-03 | 2009-07-29 | 丹东克隆集团有限责任公司 | High performance mechanical seal end plane |
| CN101603597A (en) * | 2009-06-30 | 2009-12-16 | 张家港市金鹰密封件厂 | The friction ring of mechanical seal device |
| CN102619742A (en) * | 2012-03-07 | 2012-08-01 | 大连华阳光大密封有限公司 | Dry gas sealing device for bidirectional rotary internal pressure pump |
| CN103453147A (en) * | 2013-09-30 | 2013-12-18 | 四川日机密封件股份有限公司 | Non-contact mechanical seal ring with dual-rotating-direction hydrodynamic grooves |
| CN205350360U (en) * | 2016-01-20 | 2016-06-29 | 中国石油大学(华东) | Liquid film seal end face slot type structure that can two -way rotation |
-
2017
- 2017-07-28 CN CN201710628048.0A patent/CN107401614A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493146A (en) * | 2009-03-03 | 2009-07-29 | 丹东克隆集团有限责任公司 | High performance mechanical seal end plane |
| CN101603597A (en) * | 2009-06-30 | 2009-12-16 | 张家港市金鹰密封件厂 | The friction ring of mechanical seal device |
| CN102619742A (en) * | 2012-03-07 | 2012-08-01 | 大连华阳光大密封有限公司 | Dry gas sealing device for bidirectional rotary internal pressure pump |
| CN103453147A (en) * | 2013-09-30 | 2013-12-18 | 四川日机密封件股份有限公司 | Non-contact mechanical seal ring with dual-rotating-direction hydrodynamic grooves |
| CN205350360U (en) * | 2016-01-20 | 2016-06-29 | 中国石油大学(华东) | Liquid film seal end face slot type structure that can two -way rotation |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112015002652B4 (en) | 2014-06-03 | 2024-06-20 | Thermo King LLC (n.d.Ges.d.Staates Delaware) | MECHANICAL MECHANICAL SEAL |
| CN109237041A (en) * | 2018-11-12 | 2019-01-18 | 沈阳北碳密封有限公司 | A kind of mechanically-sealing apparatus for high temperature easy vaporized medium |
| CN110159737A (en) * | 2019-06-12 | 2019-08-23 | 大连交通大学 | A kind of novel shaft end sealing device |
| CN110159737B (en) * | 2019-06-12 | 2021-10-01 | 大连交通大学 | Novel shaft end sealing device |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171128 |
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